Malicious PDF — malware analysis report

Static analysis result for SHA-256 928b6fea0c544074…

MALICIOUS

PDF

78.7 KB Created: 2021-03-16 10:55:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 67d35cb7b639b714bfc9aba8714da3ef SHA-1: 53edc5daafedc91f1a7b12e60863d8a4292d730c SHA-256: 928b6fea0c54407414fece68086ffe389b6c5644ca66b47ad83ed32fa79e4cb9
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xezojetit.ru/123?utm_term=biology+1b+final+exam+review+answers PDF link annotation
    • http://gifazat.iblogger.org/capital_markets.pdfIn PDF document text
    • https://gozawufi.weebly.com/uploads/1/3/1/3/131398332/7273708.pdfIn PDF document text
    • https://vemusosafuz.weebly.com/uploads/1/3/1/3/131398108/1614526.pdfIn PDF document text
    • http://metikinave.22web.org/67560406318.pdfIn PDF document text
    • https://lexobuto.weebly.com/uploads/1/3/2/7/132740623/8d9fefedd.pdfIn PDF document text
    • https://daniwevuwawudo.weebly.com/uploads/1/3/4/8/134849628/gunegavigajukumonuxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luvurabanalo.rf.gd/tamil_newspapers_free_download.pdfIn PDF document text
    • http://bumerezuwo.epizy.com/sv2000_dvd_recorder_remote_control.pdfIn PDF document text
    • http://wanudozadix.rf.gd/ralomazagonenotetawugus.pdfIn PDF document text
    • http://maxefaronuxugur.epizy.com/55175813039.pdfIn PDF document text
    • http://tunizalureb.rf.gd/badavosofularideledow.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/tixumivuxazagoduzewob.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/fokibeziledojapototagep.pdfIn PDF document text
    • https://3dd85f33-233b-4b3c-8e53-142bc8307eec.filesusr.com/ugd/8df890_098976e98b504251b599f89045aeab83.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/varolexexus/3d_animated_ppt_slides_free.pdfIn PDF document text
    • https://fa886832-b9e3-4ce5-a98c-97da2614721f.filesusr.com/ugd/9f8050_1ac2fa1056ac4270a03205c55607efc6.pdf?index=trueIn PDF document text
    • http://danetuxu.rf.gd/nejupinebinosukewibosip.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/38147086736.pdfIn PDF document text
    • http://bazobajinazar.rf.gd/peritoneal_fluid_cytology.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F1 5648 bytes
SHA-256: a1d75f9b5d0f0b66978aa978db2bffcddf7284a87c2c75e9a7b7bbc17afd98ea
font_01_sfnt_off0001074b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074B 11124 bytes
SHA-256: 2a2e186df9331c3f16986addd5c69864ff52fc4d30674f69f5caa86829784322

Open this report in the interactive analyzer, or submit your own file for analysis.